Plectosphaerella Kleb., Phytopath. Z. 1: 43 (1929)
MycoBank number: MB 4197; Index Fungorum number: IF 4197; Facesoffungi number: FoF 01335; 20 morphological species (Species Fungorum 2020), 14 species with sequence data.
Type species – Plectosphaerella cucumerina (Lindf.) W. Gams
Notes – Plectosphaerella was introduced by Klebahn in 1929 (Palm et al. 1995). The type species is Plectosphaerella cucumerina, a holomorphic fungus (Zare et al. 2007, Carlucci et al. 2012). Plectosphaerella can be distinguished from other taxa by its asexual morph with the ratio of septate conidia, conidial shape and dimensions and presence or absence of chlamydospores (Carlucci et al. 2012).
Figure 201 – Plectosphaerella cucumerina (Material examined – AUSTRALIA, Queensland, Tewantin, on the leaf of Lactuca sativa, 22 January 1991, Mayers, P.E., BRIP 17392, = Monographella cucumerina). a Herbarium material. b Host. c Colony on the host. d Appearance of colonies on leaf surface. e, f Conidiophores. g Conidiogenous cell. h, i Conidia. Scale bars: c = 100 µm, d = 1 mm, e, f = 25 µm, g = 15 µm, h-i = 5 µm.